Bogie for rolling stock



Sept, 16 1924.

F. 1.. BROUSSOUSE BOGIE FOR ROLLING STOCK Filed Feb. 21. 1923 INVLIVTbBFzezvanw L Beouasom I mama Sept. 16, 1924.

UNITED STATES I 1,508,954 PATENT orrics- FEBNAND LOUIS BBOUSSOUSE, OF IPABIS, FRANCE.

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Application filed February 21, 1928. Serial No. 620,496.

To all whom it may comemr Be it known that I, 'FERNAND LOUIS BROUSSOUSE,a citizen of the French Republie, and residing in Paris, Seine, France,44 Rue de Lisbonne, have invented certain new and useful Im rovements inand Relatin to Bogies for olling Stock, of which the following is a comlete specification.

This'invention reliites to bogies for rolling stock of an description,in which the frame is provide with lateral members receiving the truckbolster which carries thelusua pivot. In my said invention, the saidlateral members are constituted by the very springs of suspension of thebogie u on its axles, thus rendering possible to o tain a dead weight assmall as possible, while complying with the main 1' uirements of thetraction, concerning stabi ity, a good balancing, strength, and secur tyand minimizing the necessary force for swinging the truck or bogie.

In the accompanyin drawing which shows by Way of exam e a constructionalform of a bogie accor ing to the resent invention, more particularlyintende to be applied to a passenger carriage:

Fig. 1 is a perspective view of the bogie.

Figs. 2 and 3 show the side suspension springs in two differentpositions of operation.

In the constructional form shown in the drawing, both axles of the bogie2, 3 are provided at their ends with axle boxes 4, 5, and 6, 7respectively, which boxes are connected in the. longitudinal directionmeans of two sets of plate springs 8, 9. cross beam or bolster 10 restsupon both groups of springs'S, 9 which the said bolster connectstogether by means of any convenient means; the said bolster carryin apivot 11 and the two usual truck side arings 12, 13.

As it may be more particularly seen in Fig. 1, each lower group ofsprings, such upper spring being cambere and braking reactions aretransmitted through the main plates of the said springs. ljhe combinedcurve of the plates of the spring groups 8 8 is such that, as shown moreparticularly on Fi 2 and 3 which show the said springs m5; tare andunder maximum load respectively, it may be seen that the distance apart,(A) of the axle boxes, and consequently of the axles, is constant duringthe whole vertical flexion of the springs due to the load. As it may beseen, the ower spring 8 bein straight, and upwards for the positionunder tare, a lowering of the said springs determined by a load causesthe connection points of the upper spring 8" to be widened away-and, atthe sametime the pivots of the lower spring 8 to be brought nearer. Thisvariation of tension of the said springs results in a pivoting of theaxle boxes 4, 5 round their axes, that is to say round the axis of theirrespective axles, thus keeping the said axles at their normal distanceapart.- 8 The arrangement of the four sprin on each side of the bogie,minimizes the raw-' backs caused by an eventual breaking of a mainplate, such accident, in fact, resulting only in a momentary overload ofthe three remaining undamaged springs, without causing a general damage.

The compact construction of the said bo ie avoids the rovision of guidesfor the ax e boxes whic always, in the rolling stock are a cause ofdisturbance owing to their ra id wearand the necessity of a frequent oiing.

.The substitution of boxes provided with ball bearin s for the ordinaryboxes enables, with the sad construction, to obtain a bogie whichpractically needs no repair.

What I claim is:

1. A bogie for rolling stock of any description, characterized by thefact that the side members of the bogie frame are constituted by thesuspenslon springs of the said bogie, which are directly ivoted u on theaxle boxes, and are rovi' ed with fferent curvatures and dimensions inorder to maintain constant the distance apart of the axle boxes and couently of the axles, whatever the flexion o the said springs may be. I a

- 2. A constructional form of the sus ension ;10' springs according toclaim 1, accor to which each set of side springs comprises two groups oftwo springs, arranged at the upper part and at the lower part of theframe, respectively, the upper springs being bent upwards for theposition under tare, and the lower springs being straight for the sameposition, in order to insure under a load, the lengthening of the upperspring and the shortening of the lower spring, thus causing a rocking orpivoting of the axle boxes around their own axes, without varying theirdistance apart.

3. A bogie according-to claim 1, in which the said bogie, in its planview, constitutes a frame having the shape of a double T, the

central branch of which is ri id and receives the pivot of rotation,whilst the side branches are each constituted by two groups ofsuspension springs connected with the axle boxes.

4. In a bogie frame, pivoted axle boxes, and groups of springs arrangedone above the other and ivoted to the axle boxes, the springs of eachgroup comprising a plurality of springs arranged side by side.

naoaese 5. A bogie frame, comprising two groups of springs for eachside, the grou s being arranged one above the other, an a cross beamsecured to each group of springs at the center of their length.

6. A bogie frame comprising two groups of springs for each side, thegroups being arranged one above the other and each group comprising aplurality of springs arranged side by side, and a cross beam secured toeach group at the center of their length.-

7. A bogie frame, comprising two groups of springs for each side, thegroups being arranged one above the other and each comprising aplurality of springs arranged side by side, boxes adapted to be pivotedon the axles and to which the s rings of each of the groups-is pivoted,and a cross beam secured to each of the groups at the middle of theirlength. I I

In testimony llhave hereunto set my hand.

FERNAND LOUIS BRQUSSUTUSE

